The AirTAC GFR30008C1WTK AirTAC Filter Regulator NPT1/4, 5 um is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/4" ports, a differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR30008C1WTK is a size 300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration carries a 1/4 in NPT port, a fine 5 um filter element (code W), a differential-pressure drain that bleeds collected condensate automatically as flow passes through, a round pressure gauge with MPa scale, and a built-in reverse/check valve that holds downstream pressure when the supply is lost. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl is standard at this size, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and with choices of drain type, filter grade, gauge style and scale, thread form and bracket. Flow figures are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for this exact model on request.
| Model | GFR30008C1WTK AirTAC Filter Regulator NPT1/4, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, MPa scale |
| Reflux valve | Fitted (reverse flow permitted) |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| 08 | Port size PT1/4". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR300 · PT1/4" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Feeding tool-clamp and chip-clearance cylinders on a CNC machining centre, where the 5 um element protects directional valves from particulate and the regulator holds a steady setting at the machine.
Supplying stopper, pusher and diverting cylinders on a bottling or carton packaging line, with the check valve holding the set pressure against downstream cylinders if the plant air supply dips.
Regulating clean, dry air to sample-handling grippers and actuated valves in a laboratory automation cell, where the 5 um grade and MPa gauge support a controlled, monitored supply.
Start with the port step: this size 300 unit takes a 1/4 in port, and the GFR range steps through sizes 200/300/400/600 with ports from 1/8 to 1 in, so pick the size whose flow curve covers your demand rather than oversizing on port alone. Because flow is published as curves and not a single rated figure, ask us to confirm sizing against your application before ordering. Next, choose the drain: this model uses the differential-pressure drain, but automatic (code A) and manual (code M) versions exist if your duty or maintenance routine suits them better. This unit carries the 5 um element (code W); the standard grade is 40 um if your circuit does not need finer filtration. The round gauge here reads in MPa; psi and bar scales are available, and an embedded square gauge is the standard alternative. Thread is NPT on this model (code T); PT is the catalogue standard and G (BSPP) can be ordered. A mounting bracket is included, and the reverse/check valve (code K) is fitted.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR flow data as curves rather than a single rated figure, so we do not quote a rated flow, Cv or l/min number for this model. Tell us your working pressure and air demand and we will confirm the datasheet flow curve and sizing for this exact unit on request.
The W in the code GFR30008C1WTK specifies the optional 5 um filter element instead of the 40 um standard, and the K specifies a built-in reverse/check valve that holds downstream pressure when the supply is interrupted. The 1/4 in NPT port, differential-pressure drain, round MPa gauge and included bracket are also read directly from the code.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.